The UNSC's tech is outdated for being 500 years in the future. Extremely outdated.
Humans now are already developing warp drives, active camouflage, exoskeletons, hydrogen fuel cell cars, nuclear reactors with zero emission, and more! While we certainly aren't even close to creating a 3 mile long super-ship, we should be far beyond that in, I dare say, 300 years! Maybe even less! Even a Spartan by then would be unimpressive!
For 500 years into the future, I'd be willing to wager that the Covenant would be little more than a bug to us. A nuisance.
By then, I would assume humanity would have things like... I've actually got nothing. What we could do by then is unthinkable. Maybe we can make stars go supernovae?
[i]What do you think?[/i]
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Edited by Violet: 1/22/2013 5:01:00 AMKeep in mind that when humanity actually does begin colonizing other planets in the Halo universe, their fleet waves the flag of the UNSC: The United Nations Space Command, which operates under the Unified Earth Government. In my opinion, 500 years might be a fairly accurate estimation of when this technology would be available to us. We have many restrictions in place to prevent us from advancing technologically at the rate at which we're capable of; war, money, society, lack of resources, etc. Only under a more unified Earth might we be able to extend our galactic borders. Even without those restrictions, developing the technology necessary to travel light-years in the amount of time that UNSC ships can would take decades upon decades upon decades of thought and experimentation.